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Control Water valves through valve controller using Ethernet communication

Hi, I am using I2C  Valve controller to control the the electronic water valves through the circuit which I am thinking to design to connect the contact closures which directly connect through a single ethernet port, there are  more than 10 valves at same time to send the operate through ethernet port connected to FET valve controller which is also using I2C to ethernet shield for compatibility.  

so looking for better way to design the circuit in such a way, so that it will be easier to make ethernet compatibility of water valves with I2C based valve controller which further use with microcontroller also to control the speed of valve controller,

Any kind of suggestion to make this kind of circuit will be very helpful.